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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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The human body produces and destroys 15 million blood cells every second.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

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